Electrical module comprising a MEMS microphone
First Claim
Patent Images
1. An electrical module comprising:
- a base plate having an acoustic channel that opens into a first cavity at a first end and that is closed-off by a microphone chip at a second end;
a cover that seals to the base plate;
wherein the microphone chip borders a second cavity that opens to an exterior of the electrical module;
wherein the second cavity is separated from the acoustic channel by the microphone chip;
wherein the first and second cavities are between the base plate and the cover; and
wherein the cover comprises a separation ridge that separates the first and second cavities.
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Abstract
An electrical module includes a base plate having an acoustic channel that opens into a first cavity at a first end and that is closed off by a microphone chip at a second end. The microphone chip borders a second cavity that opens to an exterior of the electrical module. The second cavity is separated from the acoustic channel by the microphone chip.
235 Citations
16 Claims
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1. An electrical module comprising:
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a base plate having an acoustic channel that opens into a first cavity at a first end and that is closed-off by a microphone chip at a second end; a cover that seals to the base plate; wherein the microphone chip borders a second cavity that opens to an exterior of the electrical module; wherein the second cavity is separated from the acoustic channel by the microphone chip; wherein the first and second cavities are between the base plate and the cover; and wherein the cover comprises a separation ridge that separates the first and second cavities. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electrical module comprising:
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a base plate having an acoustic channel that opens into a first cavity at a first end and that is closed-off by a microphone chip at a second end; wherein the microphone chip is above a first opening in the base plate; and wherein the base plate has a second opening through which the acoustic channel is connected to the first cavity.
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13. An electrical module comprising:
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a base plate having an acoustic channel that opens into a first cavity at a first end and that is closed-off by a microphone chip at a second end; wherein the base plate comprises a first layer having a recess and a second layer above the first layer in an area of the recess that forms at least two openings, the acoustic channel being in the recess. - View Dependent Claims (14)
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15. An electrical module comprising:
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a base plate having a recess that defines an acoustic channel, the base plate comprising a first layer and a second layer, the second layer being above the first layer and above at least part of the recess to form a first opening and a second opening; a microphone chip connected to the second layer and over the second opening; a cover having a separation ridge, the cover and the separation ridge being sealed to the second layer, the cover being over the first opening and over the microphone chip, the separation ridge forming a first cavity over the first opening and a second cavity over the microphone chip, the first cavity being closed to an exterior of the electrical module, and the second cavity having a third opening to the exterior; and at least one chip element electrically connected to the second layer and in the first cavity. - View Dependent Claims (16)
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Specification